Having lower back pain with the ab wheel but still want to use it? Give these variations a try!
Best Ab Wheel Exercises for Avoiding Back Pain
Learn The Standing Ab Wheel Rollout – Without Hurting Your Lower Back
Why Russian Twists are Hurting Your Back (and What to do About it) - Strength Resurgence
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How to Use an Ab Roller: 10 Steps (with Pictures) - wikiHow
Why does the ab wheel rollout hurt my lower back, and how do I fix this? - Quora
How to Use an Ab Roller to Train Your Core and Build a Six-Pack
How Effective Is an Ab Wheel Roller? Benefits of Ab Rollouts – DMoose
9 Exercises for easing and preventing upper back pain
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7 Benefits of Training with an Ab Roller
The Six Best Alternative Exercises to the Ab Wheel